#include #include #include #include #include #include #include int b[100006]; int s[100005]; int prime[100006]; int pcnt; int main(){ int i,j,n,a; for(i=2;i<=100000;i++) { s[i]=s[i-1]+1-b[i]; if (!b[i]) prime[pcnt++]=i; for(j=0;j